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Internal Disconnecting Type Ties
In this type of tie, the tie member contains threaded ends so, the external members can be removed without any breaking or pulling. Internal disconnecting ties are classified into two types as follows.
2019-10-10 -
On Construction Project, How to Set Good Safety Plan for Concrete Formwork System?
Good safety plans for the formwork system ensure execution of construction project as per established construction practice and avoid undesired events such as failure of formwork and consequent delay in construction and possible loss of life. Commonly, safety shall begin in the planning and management of a project.
2019-10-10 -
How to Achieve Economy in the Cost of Formwork Construction?
The reduction of formwork construction is essential in declining the total cost of the project because it accounts for up to 60% of the entire cost of the concrete structure. Decision made at the design phase can play a crucial role in this regard. New materials, accessories, and prefabricated formwork components may enable designers to achieve their design goals at a lower cost.
2019-10-08 -
6 Factors Affecting Lateral Pressure of Fresh Concrete on Formwork
There are several factors that influence the magnitude of the lateral pressure of fresh concrete on formwork sides. For instance, concrete weight, rate of placement, vibration, the temperature at the time of pouring, chemistry, and slump. Formwork designers need to take these factors into considerations during the design process. The freshly placed concrete behaves temporarily like a fluid, producing a liquid pressure that acts laterally on vertical formed surfaces.
2019-10-08 -
Do You Know How to Install a Slip on Flange?
Slip-On flanges or SO flanges are commonly lower in price than weld-neck flanges, and to this effect are a popular choice for our customers. However, customers should bear in mind that this initial cost saving may be diminished by the additional cost of the two fillet welds required for proper installation. Moreover, weld-neck flanges have a higher life expectancy than slip-on flanges under duress.
2019-09-29 -
Lap Joint Flange VS. Threaded Flange
Lap Joint Flanges are primarily installed with lap joint stubs, the combined initial cost of which is approximately 1/3 higher than that of comparable weld neck flanges. Their pressure holding ability is little, if any, better than that of a slip-on flange and their fatigue life is only 1/10 that of welding neck flanges.
2019-09-29 -
Welding Neck Flanges VS. Slip-On Flanges
Welding Neck Flanges (Weld neck Flanges) are distinguished from others by their long tapered hub and gentle transition of thickness in the region of the butt weld joining them to the pipe. The long tapered hub provides an important reinforcement of the flange from the standpoint of strength and resistance to dishing.
2019-09-29 -
Socket Weld Flanges VS. Blind Flanges
Socket Weld Flanges are available for use on small-size high-pressure piping. Their initial cost is about 10% higher than that of slip-on flanges. When provided with an internal weld, their static strength is equal to that of double-welded slip-on flanges while their fatigue strength is 50% greater. Smoothbore conditions are possible by grinding the internal weld, unlike with slip-on flanges which require that the flange face be beveled and re-faced after welding. The internally welded socket type flange is becoming increasingly popular in the chemical process piping industry.
2019-09-29 -
Pipe Fittings & Flanges: How to Install a Slip on Flange?
Slip-on flanges usually “slip” over a pipe and are welded in place. This allows the flanges to swivel freely to easily align bolt holes prior to installing and welding in place. Flanges are most often used to connect pipes that have diameters of more than 2 inches. The flange’s joint consists of two matching disks of metal, separated by a gasket, that are bolted together to achieve a secure seal with the gasket material.
2019-09-29 -
Pipe Fittings & Flanges: Brief Introduction of Stub-end
The “Stub-end” can normally be purchased in two lengths. There is a short version, about 3” long and a long version of about 6” long. It is prudent for the piping designer to know which version is in the piping specification.
2019-09-29 -
Pipe Fittings & Flanges: Brief Introduction of Lap Joint Flanges
A Lap Joint Flange is a two-piece device that is much like a weld-neck flange but also as a loose slip-on flange. One piece is a sleeve called a “Stub-end” and is shaped like a short piece of pipe with a weld bevel on one end and a narrow shoulder on the other end called the hub.
2019-09-29 -
Pipe Fittings & Flanges: Brief Introduction of Slip-on Flanges
Slip-On Flanges are preferred by some contractors, over the Weld-neck, because of the lower initial cost. However, this may be offset by the added cost of the two fillet welds required for proper installation. The strength of the slip-on flange is ample for its rating, but its life under fatigue conditions is considered to be only one-third that of the weld-neck flange.
2019-09-29 -
Pipes Fittings & Flanges: Brief Introduction of Weld Neck Flanges
Weld Neck Flanges are distinguished from other flange types by their long tapered hub and gentle transition of thickness in the region of the butt weld that joins them to pipe or fitting. A weld-neck flange is attached to a pipe or a fitting with a single full penetration, “V” bevel weld. The long tapered hub provides an important reinforcement of the flange proper from the standpoint of strength and resistance to dishing.
2019-09-29 -
Why Slip On Flange Connection is Not Strong As Weld Neck and Socket Connection?
Slip-on flanges are preferred to weld-neck flanges by many users because of their initial low cost and ease of installation. Their calculated strength under internal pressure is about two-thirds of that of weld-neck flanges. They are typically used in low-pressure, low-hazard services such as fire water, cooling water, and other services.
2019-09-29 -
Steel Pipe: Materials for Pipe
Engineering companies have materials engineers to determine materials to be used in piping systems. Most pipe is of carbon steel (depending on service) is manufactured to different ASTM standards. The carbon-steel pipe is strong, ductile, weldable, machinable, reasonably, durable and is nearly always cheaper than pipe made from other materials. If a carbon-steel pipe can meet the requirements of pressure, temperature, corrosion resistance, and hygiene, it is a natural choice.
2019-09-27